Abstract

It is expected that by utilizing marginal land (e.g. saline field) is able to increase rice production under saline condition. One of integrated approaches that can be applied is a raised- and sunken-bed system. This experiment aimed to investigate the growth and yield of rice under raised- and sunken-bed system as affected by saline irrigation. The field experiment was conducted at Baros Helmet, Bantul District, Yogyakarta from October 2016 to February 2017. The experiment was arranged in a multi-location (oversite) design, consisted of saline irrigation (S1) and nonsaline irrigation (S0) in a raised-bed (A1) and sunken-bed (A0) planting system. The observations were done on leaf area index, chlorophyll a, chlorophyll b, total chlorophyll, photosynthesis rate, total dry weight, root length, leaf Na+ and K+ concentration, proline concentration, maturity and dry grain yield (DGY). The results showed that saline irrigation negatively affected leaf area index, photosynthetic rate and root length of rice grown at sunken-bed. However, leaf Na+ concentration and leaf proline concentrations of rice grown at sunken-bed were higher. The leaf K+ concentration decreased with increasing Na+ concentration. Although saline irrigation could accelerate harvesting age of rice grown at sunken-bed, the dry grain yield of rice grown at sunken-bed did not significantly different with that of rice grown at raised-bed.